-89.84% is the change from 866 to 88
Calculation steps:
[( 88 - 866 ) ÷ 866] x 100 = -89.84%
Formula
Percentage change = [(88 - 866) / 866] x 100
Subtract the new number by the original number
88 - 866 = -778
-778 ÷ 866 = -0.8983833718244804
-0.8983833718244804 x 100 = -89.84%